The manufacturer of a battery claims that the mean life of it is 8 months. An agency took a sample of 40 such batteries with a mean life of 7 months and a standard deviation of 2.25 month. Using 10% significance level, is there sufficient evidence to reject the claim?
The manufacturer of a battery claims that the mean life of it is 8 months. An agency took a sample of 40 such batteries with a mean life of 7 months and a standard deviation of 2.25 month. Using 10% significance level, is there sufficient evidence to reject the claim?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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The manufacturer of a battery claims that the mean life of it is 8 months. An agency took a sample of 40 such batteries with a mean life of 7 months and a standard deviation of 2.25 month. Using 10% significance level, is there sufficient evidence to reject the claim?
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